Electrotype or engraver&#39;s planer



W 9 A. P. JOHNSTON ELECTROTYPE 0R ENGRAVERS PLANER File d Feb. 14, 1927 Imferytor Af? Johpato letters at the upper end and one ofthese letters is considered as damaged and the space occupied by the damaged letter is here- Patented Apr. 9, 1929.

UNHTEEQ treats? ALFRED 1?. JOHNSTON, OF WINNIPEG, MANITOBA, CANADA.

ELECTROTYPE OR ENGRAVERS PLANER..

Application filed February 14, 1927. Serial No. 168,103.

such that the tool can be readily taken apart for inspection, cleaning, sharpening or other purposes. I

YVith the above more important objects in view, the invention consists essentially. in the arrangement and construction of parts hereinafter more particularly described, reference being had to the accompanying drawing, in which: I I

r F 1 is a perspective view of the toolas it appears in use.

Fig. 2 is a front view of the tool with part of the handle removed.

Fig. 3 is an enlarged detailed vertical sectional view centrally and longitudinally through the tool, the section being taken in the plane indicated bythe line 3-3 Figure 4.. I

Fig. 4 is a vertical sectional view transversely through the machine, the section being taken in the plane indicated by the line it-A Figure3. s

Fig. 5 is a vertical sectional view at 5-5 Figure 3.

Fig. 6 is avertical sectional view at 6-6' Figure3.

Fig. 7 is a side view of therotary' cutter. .ln-the drawing like characters of reference indicate corresponding parts in the several figures. j

At the present time when an. eleetrotype or the like is" damaged or a replacement has to be made, the defective or part to be altered is repaired by using solder to either buildup the damaged part or hold the replaced part in place. This solder has to be worked or cut and the'cutting is usually done byemploying a chisel.

The job is accordingly rather a'laborious one andrequires extremecare and. in order to make the above explanation clearer, I have shown an electrotype in Figure 1 of the drawing, the customary plate 1 being mounted on the usual supporting block 2; The

eleetrotype is herein shown as provided with in shown as filled in with solder 3. This solder requires to be first cut down accurately to the level of the upper face of the electrotype andthen subsequently the solder is cut to form the missing letter. Ordinarily the work of cutting down the solder to the level of the face of the electrotype is done by a chisel as is also the subsequentforming of the letter and such work is not only laborious but requires extreme care.

According to-my invention,- however,. I provide a tool having a driven rotary knife therein which can be adjusted to the cut and which when in use will cut or plane'the solder easily, quickly and accurately to the level of the face of the electrotype or such like. The machine provided is now described in detail.

The casing or body of the machine comprises two similar right and left end heads- 4 and 5, front and back plates 6 and 7 fastened thereto by screws 8 and a top plate-9 also fastened to the heads by screws 10. The bottom of the casing is open. Each of the head plates is provided'with an extending boss or hub 11 and the boss is provided on the outer face with a circumscribing ball raceway 12 and is centrally apertured as indicated at 13 to receive the driving shaft 1e, it being here observed that the opening or aperture is considerably larger than the shaft so that the shaft ispermited a vertical movement. 7 p

The heads are also vertically slotted as indicated at 15 to receive slidably'bearing blocks 16 and 17 and these bearing blocks carry rotatably the shaft- Adjoining the bearing block 16, the shaft is provided with a collar 18 and adjoining the other bearing block, the shaft is shouldered as indicated at 19 and has screw threads 20 adjoining the shoulder. The 'left hand end of the shaft is screw threaded as indicated at 21.

Similar annular rollers 22 and 23 are mounted on the bosses, the rollers being provided'with internal ball raceways 24 complementary to those 12 and ball bearings 25 are inserted between the ball raceways. The rollers are held in place byannular plates 26, the central apertures '27 of which register with those 13. The annular plates are fastened'to the bosses by screws 28. It

will be observed that the lower sides of the rollers extend slightly beyond theunder face of-the casing so that the tool rides on the rollers. v

The rotary cutter 29 is in the form of a cylindrical multi-bladed knife and it is placed on the shaft between the heads and has the ends thereof cored out and one end engag ing the shoulder 18 and the'other end engaged by a nut screw threading on the threads 19 of the shaft. The nut 30 when tightened up effectively :jams the cutter and holds it to the shaft. Such arrangement permits of-the ready removal ofthe cutter from the shaftqfor sl'iarpening purposes. It will be observed that the blades 31 of the through the top p'lateand has the lower end thereof attached to, the bearing block in a manner such thatthe screw 1s anchored to the bloclrbut is permitted to freely rotate in respectv to the, same. This is accomplished by providing a head 35 at the-lower extremity of the screw which is connected to the sor ew'body by a contracted. neck '36. head '35v is pocketed in-the block and a retainingplate 37 is fastene'dby screws, 38 to the block, the retaining .plate 7 being "providedi with .a slot 89 which receives the neck and overlies the head35.

To the upper end of the screw in eachv instance, I secure a finger piece 40 which-1s provided with a downwardly, extending sleeve 41, the sleeve receiving telescopically anupstanding statlonary sleeve 42 which is secured to the top plate 9. Theinner sleeve 42 is provided wlth avertically extending scale 43. and the lower end of the outer sleeve is provided with a circumscribing graduated I scale 44. -The distance between each mark on thevertical scaleindicatesthepitch of the thread of the screw32 and the distance bet-ween the marks of thehor'iaontai scale on the outer sleeve indicates a definite fraction of a revolution of the sleeve, Accordingly by "turning the finger pieces 40 and observing the readings on the scales, one

4 can accurately gauge the position of the guard prevents clippings from lodging the A flexible strip 4? 7 bearing blocks and accordingly the position,

of the face of the cutter 29;

WVithin the casing I locate a curved guard plate 45 which passes .over the cuttingblade and has the forward edge thereof secured by suitable bolts 46 to theplate '6. .This

interior of the casing. is also secured tothe casing by the latter bolts and'is adapted toprevent the knives from throwing the clippings ahead and onto the electroplate. Ahandle 48 is attachedto the upper rear corners of the casingabyth'e screws 8 and 10. Mea is provided for posadjusting screws 49 which screw thread tlirough'the front plate"6 'and heads 4 and .5 and have their innerends engageable with the bearing blocks and their outer ends provided'with finger pieces 50.

When one desires to repair say a. damaged letter on an electrotypewhi'ch has bee'n sold-ered over as indicated at 3, he can/place two metal: bars '51a'nd 522011 the face of'the ele'ctrotype as shown in Figure 1. Hethen places thes tool in a position such that the rollers 22- and 23 will ride the bars and um rotary cutter will be clear of the bars He next carefully adjusts the screws '32 to-positi'on the rotarylcutter so that itwill 017113; thesolder 3 tothe level of the upper face of the ele'c'trotype. Having done this, the set screws 49 are. tightened up against the blocks. The :shaft 14 of the tool is then driven at a highspeed whilst the tool is being moved over the solder. The blades of the rotary cutting-knife will cut the solder sothat it is flush with the upper face of theelectrotype. V iAny 'suitablemea-ns can be employed forv driving the shaft 14, such I bemg herein shown indotted outline-inFig'u-re 1 as a flexible driving shaft-53 coupled to; the screw'threaded end of {the shaft 14.

' Ifthe surface of theelectrotype be relativelysmooth', one-does not require touse the bar's51i and 52 as the rollers canthen ride the face of the electrotype and the rotary cutter can be adjusted accordingly. ,.Tl1is tool can be used on-flat forflcurve'd electrotypes or other. plates. as will-be readilyunderstood by one familiar .lwith'the art? VVhatl claim asmyinventionis V. 1. An electrotype or engravefisplaner. comprising. a casing fitted with-.yendf rollers and a handle and having the under side thereof open-,a pairof bearing blocks, slid- 1 i a ly. Vmounted n, the ends of the caslng and movable in a directiontow ards oraw ay from the open side thereof, ad nsting screws screw threading through the 'enfdsof the top of the casing and hav ng their, lower-ends swivelly; attached to the .bea ringsblocks and their upper ends provided withifingerpieces,

registering adjusting scales carried by the screws and the ,top of the casing respec: tivelypa drive shaft rotatably mounted in the bearing blocks and liavingiohe end extending through the end of the casing and r a cylindrlcal rotary cutter; mounted on the v shaft within the-casing and presentlng sp1-,

ralling cutting blades.

2. In combination, a; pairyofopposing end head's provided atthelr inner'sides wlth'vers 'ticalslots forming guideways and at their outer sides with extending: bosses andihaving elongatedwvertically disposed apertures passingethrough. "the, bosses and-{opening to the slots, front, back and top plates connecting the heads together, opposing bearing blocks slidably mounted in the guideways, a driving shaft rotatably carried by the hearing blocks and extending through the apertures in the heads and vertically shiftable in said apertures, a rotary cutter in the form of. a cylindrical multi-bladed knife secured to the shaft between the bearing blocks, annular rollers rotatably mounted on 10 Signed at Winnipeg, this 21st day of J an- 15 uary, 1927.

ALFRED P. JOHNSTON. 

